My Inquiry
My Account
Analog Devices Inc. AD7817BRZ-REEL
- Part No.:
- AD7817BRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7817BRZ-REEL.pdf
- Description:
- SENSOR DIGITAL -40C-85C 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,783
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7817BRZ-REEL from Analog Devices is a 10-bit, 4-channel successive-approximation ADC with integrated temperature sensor, 9 μs conversion time for analog inputs, ±2°C temperature measurement accuracy from −40°C to +85°C, and on-chip 2.5 V reference. It operates from 2.7 V to 5.5 V and serves as a compact sensing front-end in battery-powered industrial monitoring systems.
For engineers reviewing the AD7817BRZ-REEL datasheet, AD7817BRZ-REEL pinout, AD7817BRZ-REEL application, or AD7817BRZ-REEL equivalent, key selection considerations include its 4-channel single-ended analog input architecture, dedicated OTI output for overtemperature alerts, auto power-down at 4 μW (10 SPS), and SPI/8051/MICROWIRE-compatible serial interface with RD/WR control.
Technical Context
The AD7817BRZ-REEL implements a capacitor-based successive-approximation ADC core with inherent track-and-hold functionality and an internal clock oscillator. Its conversion sequence is initiated by a falling edge on CONVST, with BUSY asserted high during conversion and DOUT valid after RD/WR rising edge (t12 ≤ 20 ns).
Channel selection is controlled via a 3-bit address register written through the 8-bit serial interface; Channel 0 maps to the on-die temperature sensor, delivering 0.25°C resolution output codes. The OTI pin asserts low when the temperature code exceeds the programmable 8-bit overtemperature register value, independent of serial read timing except for automatic reset on rising RD/WR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1,024 discrete output codes for precise voltage and temperature digitization. |
| Conversion Time | 9 μs for VIN1–VIN4 - enables 111 kSPS maximum sampling rate per channel without pipeline latency. |
| Temperature Accuracy | ±2°C from −40°C to +85°C - supports reliable ambient thermal monitoring without external calibration. |
| Supply Range | 2.7 V to 5.5 V - compatible with single Li-ion, 3.3 V, and 5 V system rails without level-shifting. |
| Power at 1 kSPS | 40 μW - allows continuous temperature-aware data acquisition in energy-constrained IoT nodes. |
| Reference | On-chip 2.5 V ±1% - eliminates need for external reference component while maintaining ±1 LSB gain error. |
| Interface Protocol | SPI/8051/MICROWIRE - supports direct connection to common microcontrollers without protocol translation. |
Pinout & Package
AD7817BRZ-REEL is housed in a 16-lead narrow-body SOIC (0.15 inch) package with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start Input | Falling-edge-triggered control signal that initiates conversion and forces track-and-hold into hold mode. |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating ongoing conversion; used for interrupt-driven firmware synchronization. |
| OTI | Overtemperature Indicator | Active-low output asserting when temperature code > OTR register; resets automatically after serial read completion. |
| CS | Chip Select Input | Enables serial interface only when low; required for multi-device SPI bus sharing. |
| REFIN | Reference Input/Disable | Accepts external 2.5 V reference; tying to AGND enables internal reference and disables external path. |
| VIN1–VIN4 | Analog Input Channels | Four single-ended inputs referenced to AGND; each accepts 0 V to VREF range (2.5 V nominal). |
| DOUT | Serial Data Output | Three-state output releasing bus on falling RD/WR or rising CS - supports shared-data-bus architectures. |
| DIN | Serial Data Input | Accepts 8-bit control bytes for address register (channel select) or overtemperature register writes. |
| SCLK | Serial Clock Input | Drives synchronous data transfer; data latched on rising edge (DIN), output on falling edge (DOUT). |
| RD/WR | Read/Write Direction Control | High = read (DOUT active), low = write (DIN sampled); defines transaction direction for full-duplex interface. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Temperature Sensor | Direct access via Channel 0 yields 0.25°C resolution digital temperature output across −55°C to +125°C range. |
| Overtemperature Alert | Dedicated OTI pin provides hardware-level thermal fault signaling without MCU polling or software overhead. |
| Auto Power-Down | Consumes only 4 μW at 10 SPS and transitions to <13.5 μW standby between conversions - extends battery life. |
| Inherent Track-and-Hold | Eliminates need for external sample-hold circuitry; acquisition time of 400 ns ensures stability after channel switching. |
| Flexible Serial Interface | Native compatibility with 8051, SPI, QSPI, and MICROWIRE protocols reduces driver development effort. |
Applications
| Industrial Process Monitoring | Battery Management Systems |
|---|---|
|
Use Scenario: Real-time monitoring of motor winding temperature and supply rail voltages in PLC I/O modules. IC Role / Device Role / Timing Role: Front-end sensor hub digitizing four analog process signals plus ambient temperature with synchronized 9 μs conversions. Use Value: Single-chip integration reduces BOM count and PCB area versus discrete ADC + temp sensor solutions while maintaining ±2°C thermal accuracy. |
Use Scenario: Cell voltage balancing and pack temperature tracking in portable medical device lithium-ion battery packs. IC Role / Device Role / Timing Role: Simultaneous sampling of up to four cell voltages and thermal gradient across battery stack using shared VREF and AGND. Use Value: 40 μW power at 1 kSPS enables continuous monitoring without compromising runtime; OTI pin triggers immediate charge cutoff on thermal excursion. |
| Automotive Cabin Climate Control | Data Acquisition for Environmental Sensors |
|
Use Scenario: Measuring cabin air temperature, HVAC actuator feedback voltage, and ambient light sensor output in entry-level automotive ECUs. IC Role / Device Role / Timing Role: Low-voltage (2.7 V) operation supports start-stop battery conditions; 16-pin SOIC fits constrained ECU layouts. Use Value: On-chip 2.5 V reference removes external component dependency, improving long-term drift stability in thermally cycling environments. |
Use Scenario: Compact environmental node logging temperature, humidity sensor supply voltage, CO₂ sensor heater current, and air quality PM2.5 voltage. IC Role / Device Role / Timing Role: Four-channel capability captures correlated analog parameters in one acquisition window, reducing timestamp jitter. Use Value: 9 μs conversion time enables sub-100 μs total 4-channel scan cycle - critical for capturing transient thermal events in HVAC diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel ADC with temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7818BRZ | Single-channel variant (1 VIN) in 8-lead SOIC; identical 10-bit resolution, 9 μs conversion, and ±2°C temperature accuracy but no VIN2–VIN4. | Used where only one analog signal plus temperature is required - saves board space and cost in simpler sensor nodes. | Select AD7818BRZ when channel count can be reduced and PCB real estate is constrained; not pin-compatible with AD7817BRZ-REEL. |
| MCP3204-I/P | 12-bit, 4-channel SPI ADC (no integrated temperature sensor); requires external thermal sensing and reference; 10 μs conversion time. | Suitable for higher-resolution voltage-only acquisition; thermal monitoring must be added separately with NTC or digital sensor. | Choose MCP3204-I/P if 12-bit precision is mandatory and temperature sensing is handled externally; lacks OTI alert and on-die thermal sensing. |
Compared with AD7817BRZ-REEL, AD7818BRZ reduces channel count and package size at the expense of multiplexed sensing capability, while MCP3204-I/P trades integrated temperature functionality for higher resolution and external design flexibility - neither offers drop-in replacement capability.
Availability
AD7817BRZ-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, battery management systems, and automotive cabin climate control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7817BRZ-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design and manufacturing expertise spanning precision data conversion, amplification, and RF technologies.
The AD7817/AD7818 product line was engineered specifically for embedded thermal-aware data acquisition, integrating precision ADC functionality with calibrated on-die temperature sensing to simplify system-level thermal management in space- and power-constrained applications.
FAQ
What is the operating temperature range of the AD7817BRZ-REEL?
The AD7817BRZ-REEL operates from −40°C to +85°C with guaranteed performance, and its on-chip temperature sensor functions across −55°C to +125°C. The ±2°C accuracy specification applies within the −40°C to +85°C range, making AD7817BRZ-REEL suitable for industrial and automotive under-hood environments where thermal reliability is critical.
Does the AD7817BRZ-REEL require an external reference voltage?
No, the AD7817BRZ-REEL includes an on-chip 2.5 V ±1% reference that activates automatically when the REFIN pin is tied to AGND. An external 2.5 V reference may be applied to REFIN for improved accuracy, but doing so disables the internal reference. The AD7817BRZ-REEL maintains ±1 LSB gain error with the internal reference enabled.
How does the overtemperature indicator (OTI) pin function on the AD7817BRZ-REEL?
The OTI pin on the AD7817BRZ-REEL asserts logic low when the digitized temperature reading from Channel 0 exceeds the value stored in the 8-bit overtemperature register (OTR). It resets automatically at the end of a serial read operation - specifically on the rising edge of RD/WR while CS is low - enabling autonomous thermal fault detection without continuous MCU polling.
Can the AD7817BRZ-REEL perform simultaneous sampling across all four channels?
No, the AD7817BRZ-REEL uses a single successive-approximation ADC core with an internal multiplexer; it performs sequential conversions on VIN1–VIN4. Channel selection is controlled via the 3-bit address register, and each conversion takes 9 μs. True simultaneous sampling requires external track-and-hold circuits or a different architecture such as sigma-delta with multiple modulators.
What serial interface protocols does the AD7817BRZ-REEL support?
The AD7817BRZ-REEL supports SPI, 8051, QSPI, and National Semiconductor MICROWIRE protocols through its RD/WR-controlled serial interface. Data is clocked in on the rising edge of SCLK and out on the falling edge; CS enables the port for multi-device buses, and DOUT enters high-impedance state after RD/WR falls or CS rises - ensuring clean bus arbitration.
AD7817BRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 85°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 10 b
- Features:
- Output Switch
- Accuracy - Highest (Lowest):
- ±2.25°C (±3°C)
- Test Condition:
- 25°C (-40°C ~ 85°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
AD7817BRZ-REEL FAQ
1.How can I place an order for AD7817BRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7817BRZ-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7817BRZ-REEL reliable?
The price and inventory of AD7817BRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7817BRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7817BRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7817BRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7817BRZ-REEL?
AD7817BRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7817BRZ-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7817BRZ-REEL?
For technical support, including AD7817BRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7817BRZ-REEL requirements.
6.How does Aetrix verify that AD7817BRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7817BRZ-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7817BRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7817BRZ-REEL?
All AD7817BRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7817BRZ-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7817BRZ-REEL part is unused and in its original packaging.
Return procedure for AD7817BRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7817BRZ-REEL Tags
-
MCP9700T-E/TT
Microchip Technology
-
MCP9700T-E/LT
Microchip Technology
-
MCP9701T-E/TT
Microchip Technology
-
MCP9701T-E/LT
Microchip Technology
-
TMP235A4DBZR
Texas Instruments
-
MCP9700AT-E/TT
Microchip Technology
-
MCP9700AT-E/LT
Microchip Technology
-
MCP9701AT-E/LT
Microchip Technology
-
MCP9701AT-E/TT
Microchip Technology
,TO-226_straightlead.jpg)
-
LM335Z
STMicroelectronics
-
TMP1075NDRLR
Texas Instruments
-
TMP1075DGKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
